import java.util.concurrent.atomic.AtomicInteger;

public class Demo6 {
    public  static AtomicInteger count=new AtomicInteger(0);
    public static void main(String[] args) throws InterruptedException {
        Thread t1=new Thread(()->{
            for (int i=0;i<500;i++){
                count.getAndIncrement();
            }
        });
        Thread t2=new Thread(()->{
            for (int i=0;i<500;i++){
                count.decrementAndGet();
            }
        });
        t1.start();
        t2.start();

        t1.join();
        t2.join();
        System.out.println(count);








    }
}
